Database Concepts

by
Kroenke, David; Auer, David;

Published by
Pearson

ISBN 10:
0133544621

ISBN 13:
978-0-13354-462-6

Chapter 2 - The Relational Model - Review Questions: 2.13

Answer

Candidate keys are keys that uniquely identify each row in a relation. Candidate keys can be single-column keys, or they can be composite keys. The primary key is the candidate key that is chosen as the key that the DBMS will use to uniquely identify each row in a relation.